The answers are:
"Jordyn the jock was not as bad as I thought she would be when I first learned we’d been paired to lead the cabin of eight-year-olds."
"By the second week of camp, I realized I actually liked Mariah a lot more than I’d expected to."
The lines help to develop the theme that people who have little in common can become friends because both caracters admit that they have made previous judgements before getting to know each other. However, after sharing and going through certain circumstances, they realize that they actually like each other.
To make the sentence correct, you would add a comma after "Thursday" (option B).
This past Thursday, the mechanic told me my car needed new brakes.
